Archaeological Evidence for the Tradition of Psychoactive Plant Use in the Old World, by M. D. Merlin, from Economic Botany, Vol. 57, No. 3 (Autumn, 2003), pp. 295-323, in 30 pdf pages. Discussion of the opium poppy (Papaver somniferum), Ephedra, Cannabis, Nymphaea nouchali, Mandragora officinarum, Perganum harmala, and other ethnobotanicals, based on ancient archaeological and literary sources. Uploaded by Robert Bedrosian.